36 lines
861 B
C
36 lines
861 B
C
/*
|
|
* Copyright (c) 2013-2014 Wind River Systems, Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Non-random number generator based on x86 CPU timestamp
|
|
*
|
|
* This module provides a non-random implementation of sys_rand32_get(), which
|
|
* is not meant to be used in a final product as a truly random number
|
|
* generator. It was provided to allow testing on a platform that does not (yet)
|
|
* provide a random number generator.
|
|
*/
|
|
|
|
#include <kernel.h>
|
|
#include <arch/cpu.h>
|
|
#include <drivers/rand32.h>
|
|
|
|
/**
|
|
*
|
|
* @brief Get a 32 bit random number
|
|
*
|
|
* The non-random number generator returns values that are based off the
|
|
* CPU's timestamp counter, which means that successive calls will normally
|
|
* display ever-increasing values.
|
|
*
|
|
* @return a 32-bit number
|
|
*/
|
|
|
|
u32_t sys_rand32_get(void)
|
|
{
|
|
return _do_read_cpu_timestamp32();
|
|
}
|